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Application

For use underneath buildings. Can also be used as heavy-duty protection for over tanking membranes and to assist drainage.

Visqueen's Gas Vent Mat is a complete system when connected to air inlets and outlets. The full range consists of pipework, connectors and vent outlets. Consult manufacturer for details.

Designed to be installed with the geotextile filter side of the product facing the direction of the gas flow.

Description

Visqueen Gas Vent Mat consists of a high density polyethylene (HDPE) core bonded to a non-woven polypropylene geotextile filter membrane. Specifically designed to overcome the problem of high level gas concentrations and Volatile Organic Compounds (VOCs) underneath buildings through dilution to safe levels.

The product forms a void to collect and transmit water into drainage outlets or collection pipes. The geotextile filter side to be installed to face the direction of gas flow in accordance with BS 8102: 2009. The system should also be connected to a land drain that is maintainable.

Features and benefits:

  • Lightweight.
  • Easy to lay with high gas flow capacity.
  • Creates a depressurization zone for the collection of ground gases.
  • Technical and design support.
  • Cost effective in comparison to traditional below slab perforated pipework and fill.
  • Rolls can be cut to length with a sharp knife.
  • Developed and tested to DETR Partners in Technology Report: 1997.
  • CE marked, and manufactured in accordance with BS 8485 and CIRIA C665.

System components:

  • PRO Gas Vent Box.
  • Gas Vent Bollard.
  • Gas Flow Fittings.

Applications:

For use underneath buildings. Can also be used as heavy-duty protection for over tanking membranes and to assist drainage.

Visqueen's Gas Vent Mat is a complete system when connected to air inlets and outlets. The full range consists of pipework, connectors and vent outlets. Consult manufacturer for details.

Designed to be installed with the geotextile filter side of the product facing the direction of the gas flow.

General information
Specification data - Rubber studded sheets
Product Reference

Visqueen Gas Vent Mat

Standard product features

Technical characteristics:

  • Width: 900 mm.
  • Length: 50 m.
  • Thickness (to EN ISO 9863-1): 25 mm.
  • Compressive strength: 300 kN/m².
  • Roll weight: 74 kg.
  • Roll diameter: 1.3 m.
  • In-plane air flow capacity (with soft/ hard platens at 20 mm and 100 kPa, to BS EN ISO 12958): 155 l/m/s.
  • Shear strength (to BS EN ISO 13426-2): 1 kN.

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